kimberlite :

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  • n  a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia

  • Such conditions deep within the earth produce diamonds, which are brought to the surface in eruptions of molten magma through kimberlite, or volcanic, pipes.
  • The ore, known as kimberlite, is dug or blasted from mines; the deposits are then crushed and boiled in grease and water to separate the diamonds.
  • The lava was kimberlite, named after Kimberley, South Africa, and as it disintegrated, it released a few diamonds.

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